feat(vlm): add Nemotron-Omni RADIO post-load patches#2311
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May 25, 2026
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LGTM thank you @yuekaizhang !
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/ok to test 29bae71 |
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Hi @yuekaizhang could you please fix the ci errors, thank you~ |
- enable_radio_vit_fused_attn(): route RADIO timm ViT attention through F.scaled_dot_product_attention so the (B, H, seq, seq) attention tensor (~5 GiB per block at RADIO-v2-H + dynamic-resolution patch counts) is not materialized. Mirrors the Megatron-Bridge path's vision_config.use_flash_attn=True. No-op on non-RADIO models; invoked unconditionally from apply_model_infrastructure(). - apply_parameter_freezing(): new freeze_video_embedder knob (default False). patch_generator.video_embedder is only exercised on video inputs; on image-only training it sits in the optimizer without state (no grad → no lazy init), so dcp.load on resume raises a missing-key error. Independent of freeze_vision_tower so the image encoder can stay trainable while the video branch is frozen out. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> Signed-off-by: root <zhangyuekai@foxmail.com>
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/ok to test 60760f8 |
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This PR improves nemotron-3-omni: